Any vibration in your Saturn is unwanted and should be addressed as soon as it is noticed. If the vibrations happen at speeds of 45 to 60 miles per hour, you may have an engine mount that is bad. It is usually on the passenger side (upper right) because it is typical for this mount to collapse or tear apart, which allows the engine vibrations to transfer to the chassis causing a vibration. It is normally found in the 1992 through 2002 SC1, SL1, SL2, SW2 and SW2 equipped with a 1.9 liter SOHC or DOHC engine.
Signs and Symptoms of a Bad Motor Mount
Here are the most common ways to tell if your motor mount is bad before you take it out of your car:
- Excessive engine vibration
- Excessive engine rattling
- Abnormal engine position
- Engine damage - such as valve cover or exhaust manifold gasket leaks
- Broken engine belts or hoses
Should your car display one or a few of these signs, you should rule out other causes and change the motor mount when you’ve determined that to be the culprit.
Instructions for Diagnosis and Replacement
- Park on a flat surface and set the parking brake. If you have a manual transmission, put the vehicle in gear. If you have an automatic transmission, place it in Park.
- Open your hood and find the upper right motor mount. It is on the right side of the engine. You will need to remove the mount in order to determine if it is bad or not since you cannot see the rubber cushions unless you remove it.
- Place your floor jack on the bottom of your oil pan under your engine. Place a block of wood on the top of the jack in order to protect the oil pan. Raise the jack up just enough for the engine’s weight to be lifted from the mount.
- Two nuts attach the inner fender to the mount, and three nuts attach the engine to the mount. Remove them. You may find that the studs on the engine cover come loose. They may back out when you remove the nuts. Remove the stud nuts and screw them back in before you put on a new motor mount.
- Take the engine mount off and look for damage on it. The rubber cushions may be torn and separated from the bracket, or they may have collapsed. Replace it if it is bad. If there is no damage, the vibration may be coming from the lower transaxle mount.
- In order to put a new motor mount in, place it between the chassis and the engine. You may need to use a pry bar in order to wiggle the mount or engine to get all the bolt holes lined up.
- After you have the mount in place, replace all the nuts and tighten them.
- Let the jack down and start your engine.
Your vibration should be gone once you replace a worn motor mount. To avoid further issues, be sure to always use factory motor mounts.